1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "misc.h" 30 31 #define UMEM_OBJNAME "libumem.so" 32 33 int umem_debug_level = 0; 34 int umem_is_standalone = 0; 35 36 /*ARGSUSED*/ 37 int 38 umem_debug(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 39 { 40 umem_debug_level ^= 1; 41 42 mdb_printf("umem: debugging is now %s\n", 43 umem_debug_level ? "on" : "off"); 44 45 return (DCMD_OK); 46 } 47 48 void 49 umem_set_standalone(void) 50 { 51 umem_is_standalone = 1; 52 } 53 54 ssize_t 55 umem_lookup_by_name(const char *name, GElf_Sym *sym) 56 { 57 return (mdb_lookup_by_obj((umem_is_standalone ? MDB_OBJ_EXEC : 58 UMEM_OBJNAME), name, sym)); 59 } 60 61 /* This is like mdb_readvar, only for libumem.so's symbols */ 62 ssize_t 63 umem_readvar(void *buf, const char *name) 64 { 65 GElf_Sym sym; 66 67 if (umem_lookup_by_name(name, &sym)) 68 return (-1); 69 70 if (mdb_vread(buf, sym.st_size, (uintptr_t)sym.st_value) 71 == sym.st_size) 72 return ((ssize_t)sym.st_size); 73 74 return (-1); 75 } 76 77 int 78 is_umem_sym(const char *sym, const char *prefix) 79 { 80 char *tick_p = strrchr(sym, '`'); 81 82 return (strncmp(sym, "libumem", 7) == 0 && tick_p != NULL && 83 strncmp(tick_p + 1, prefix, strlen(prefix)) == 0); 84 } 85